My Next American Pale

[Trent]

NRB
I dunno if ya have a copy of How To Brew, maybe look it up if you dont (www.howtobrew.com), but according to Palmer's utilization table on page 65 of the book, a wort of 1038 gravity would have a utilization os 25.7%, giving you, oddly enough, 25.7IBU from the perle addition ( 8AAU x .257 75 / 6Gallon = 25.7). I always use Palmers table when calculating hop additions, and IBU's, cause I have an Apple, and therefore no Promash! As far as I can tell, it seems pretty accurate.
All the best. I'm off to read the link on contamination, and make myself even more paranoid than I am now
Trent

 

[NRB]

Google is your friend on this. Their is a lot of information out there and the maths is pretty simple. Brew software is good, but should always come second to an understanding of the process.

Agreed, and I think I have a reasonable grasp of the science behind the calculations. I've put faith (perhaps blindly) in my brew software making the correct calculations for me.

Mighty productive!

It seems like it's just which formula for hop utilisation you go by. On Promash you can calculate in several different ways.

I guess it's best just to stick to one and go by your tastes.

I've always used Rager like a lot of people around here do. I figured if I was going to swipe recipes from folk on AHB, I'd best have my software set up similarly.

I dunno if ya have a copy of How To Brew, but according to Palmer's utilization table on page 65, a wort of 1038 gravity would have a utilization os 25.7%, giving you, oddly enough, 25.7IBU from the perle addition ( 8AAU x .257 75 / 6Gallon = 25.7).

Yeah I've got Palmer's book, and Daniels' bible too. Now I have to work out why Promash is giving me a grossly incorrect calculation. Is it using FG as its base for calculating the hop utilisation factor?

I always use Palmers table when calculating hop additions, and IBU's, cause I have an Apple, and therefore no Promash! As far as I can tell, it seems pretty accurate.
All the best. I'm off to read the link on contamination, and make myself even more paranoid than I am now

I might have to do the same, but it seems pretty silly when I've got software for this specific purpose.

Don't get too paranoid about those bugs.

 

[NRB]

Okay, I've done some more reading and changed my Promash setting to have "Generic" calculation of IBU. This is based on Daniels' Designing Great Beers. To quote the Promash help file:

Generic:

Based on the Basic Whole Hop Utilization Table (table 9-3) from Designing Great Beers, by Ray Daniels, published in 1996 by Brewers Publications. Note that for pellet hops, Daniels presents a separate utilization table. However, ProMash uses a default scalar for increased utilization in pellet hops, and differences may arise (when using pellet hops) because of this. If you choose to use the Generic equation for hop IBU calculation's and also use pellet hops, we recommend setting the default increase in utilization for pellet hops to 8%.

So I've followed their instructions, added an extra 10g of Perle and come up with this:

Boarders' Brew #9 - Bastardised Pale Ale (Hellfire)

A ProMash Recipe Report

BJCP Style and Style Guidelines
-------------------------------

10-A American Ale, American Pale Ale

Min OG: 1.045 Max OG: 1.060
Min IBU: 30 Max IBU: 54
Min Clr: 12 Max Clr: 36 Color in EBC

Recipe Specifics
----------------

Batch Size (L): 23.00 Wort Size (L): 23.00
Total Grain (kg): 5.05
Anticipated OG: 1.048 Plato: 12.03
Anticipated EBC: 21.1
Anticipated IBU: 39.7
Brewhouse Efficiency: 70 %
Wort Boil Time: 90 Minutes

Pre-Boil Amounts
----------------

Evaporation Rate: 15.00 Percent Per Hour
Pre-Boil Wort Size: 29.68 L
Pre-Boil Gravity: 1.038 SG 9.40 Plato

Formulas Used
-------------

Brewhouse Efficiency and Predicted Gravity based on Method #1, Potential Used.
Final Gravity Calculation Based on Points.
Hard Value of Sucrose applied. Value for recipe: 46.2100 ppppg
% Yield Type used in Gravity Prediction: Fine Grind Dry Basis.

Color Formula Used: Morey
Hop IBU Formula Used: Daniels

Additional Utilization Used For Plug Hops: 2 %
Additional Utilization Used For Pellet Hops: 8 %


Grain/Extract/Sugar

% Amount Name Origin Potential EBC
-----------------------------------------------------------------------------
89.1 4.50 kg. JWM Traditional Ale Malt Australia 38.00 8
5.0 0.25 kg. Crystal 60L America 34.00 158
3.0 0.15 kg. Weyermann Carared Germany 36.00 63
3.0 0.15 kg. JWM Wheat Malt Australia 40.00 4

Potential represented as Points per pound per gallon.


Hops

Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
50.00 g. Perle Pellet 6.00 33.8 60 min.
25.00 g. Hallertauer Pellet 4.20 5.9 10 min.


Yeast
-----

WYeast 1335 British Ale II


Mash Schedule
-------------

Mash Type: Single Step

Grain kg: 5.05
Water Qts: 13.34 - Before Additional Infusions
Water L: 12.62 - Before Additional Infusions

L Water Per kg Grain: 2.50 - Before Additional Infusions

Saccharification Rest Temp : 68 Time: 90
Mash-out Rest Temp : 0 Time: 0
Sparge Temp : 75 Time: 20


Total Mash Volume L: 16.00 - Dough-In Infusion Only

All temperature measurements are degrees Celsius.